To stop tcpsvcs.exe from running when you restart your computer. Go to start, then run, then type
in "msconfig". To the far right should be a tab that says start up. Click on it and scroll down and find that tcpsvcs.exe file. Uncheck it and restart.
Check machine for the trojan Backdoor.egghead A good trojan detection is Stinger.exe by Mcaffee it's a free download
Good luck

Are you adventurous? Uncheck the process in msconfig. Reboot and see if your internet connection still works. If it does, then you don't need it. If it doesn't just reverse the process. (I am running DSL on same kind of setup you are using and I don't have that process listed in my Task Manager).